Patents by Inventor Pietro Ciboldi

Pietro Ciboldi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gas-insulated electric switchboard
    Patent number: 5099389
    Abstract: An electric switchboard for medium voltages provides for the insulation of the compartments by means of sulfur hexafluoride gas, and each compartment is subdivided into superimposed cells which are metallically separated from one another and are gastight. In the cells auxiliary isolators are also provided for electrically isolating parts of the compartment for the purpose of maintenance without putting the entire switchboard out of action.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: March 24, 1992
    Assignee: ABB Sace S.p.A.
    Inventor: Pietro Ciboldi